Ignition-dynamo.



UNITED STATES PATENT OFFICE. A

CHARLES THOMAS MASON, OF SUMTER, SOUTH CAROLINA, ASSIGNOR TO SUMTER ELECTRICAL COMPANY, A CORPORATION OF SOUTH CAROLINA. j

IGNITION-DYNAMO.

To HZ whom. {tmc-'1,' concern:

Be it known that I, CHARLES THOMAS Mason, a citizen of the United States, residing atv Sumter. in the county of Sumter and State of South Carolina, have invented certain new and useful Improvements in lgnition-Dynamos, of which the following is a specification, reference being had to the:

` vide a machine of increased efficiency in which the spark is ot the Same intensity 1n either the advance or retard position, in 4 which thev various parts are easily ,constructcd and asseiiibled,'all sliding circuit contacts being eliminated, and the elimination of the multiplicity ot circuit connections heretofore necessary between the primary winding. the condenser, and the circuit breaker, in machines having Stationary windings.

VIn the accompanying drawings Figure 1 is a sectional view ot a, magneto embodying my invention, Fig. 2 a sectional view at right angles to the position shown in Fig. 1, and Fig. 3 a schematic diagram of the circuit connections.

The saine letters of reference denote the same parts wherever they are shown.

1 denotes a base of non-magnetic material having upwardly projecting portions 2 and 3 which support the U shaped permanent magnet 4. The polar extremities of 4 have suitable apertures through which project the sleeve bushings 5 and 6.01 the end plates 7 and S which find bearing in the Supports 2 and 3, but which. ai'e in close contact with the inner polar-surfaces of the magnet 4. Placed between the end plates 'i' and 8" is a grou y of lamin shown at 9 forming a core for t ie windings 10 and 11 which may be placed one on top of the other or in any other Specification of Letters Patent.

Application filed May 10, 1912.

Patented July .28, 1914.

Serial No. 696,487.

brass or other non-magnetic rings indicated at 12 and 13.

It will be observed that the laminations, end plates, and rings just described form a field structure which is free to move in the bearings in the Supports 2 and 3. .This structure forms a housing, the inner portions of the laniinations being cut away to leave oppositely positioned pole shoes indicated at 14 and 15.` Attached to the field structure and movable therewith is the condenser 16 which may be connected to the windings and, as it is movable with said windings, all sliding contacts are eliminated.

In bearings formed in the Sleeve bushings on the end plates 7 and 8 are vplaced the shafts 17 and 18 of a rotor consisting of the magnetic elements 19 and 20 separated by a. block of non-magnetic material 21. It will be noted that the members 19 and 20 form 75 movable polar extensions to the polar extremities of the magnet 4 and always maintain the same polarity in relation to said magnet irrespective o their position in relation to Same. more fully described and claimed in the application Jfor Letters Patent hereinbefore mentioned.

Attached to one of the shafts is the cam 22,

and attached to the corresponding end plate possible to advance or retard the time of the spark while the intensity ofthe spark remains the Same because the intensity of the magnetic flux remains the Same for all positions of the eld.

By reference to Fig. 3 a Suit-able form of 100 circuit connection will be seen. One -side each ot the primary and secondary windings 10-11 is connected to the frame of the machine as is also one of the circuit interriipter contacts 2.6. One side of the Spark plug or vother igniting device iS connected to the trame oi' the engine which, of course, is in electrical connection with the trame of the magneto through the base ot same. A conductor 27 connects the rei'iiainin'g side of the 110 This feature ofdesign is 80 As the intel'- U0 primary winding and one side of the condenser 16 to the insulated interruptor contact 25. 'The other side of the condenser 'is connected to frame and 26. The wire 28 is the usual high tension cable direct to the insulated terminal of the park plug. I

. It will be observed rom the foregoing 'that I eliminate all brushes, commutators or collecting rings and sliding contacts of any nature, which is of reat advantage especially in connection with the primary circuit of a magneto of this type. I also eliminate the necessity of laminae in the movable rotor, that the total number of parts heretofore necessary have been greatly reduced and their construction materially simplified. The construction of the field structure is such that the windings placed thereon may be readily insulated and the condenser may be of ample size, whereas heretofore 1t was necessary to restrict the size of the condenser as much as possible, owing to the fact that to insure the best results the condenser was commonly mounted into the armature structure.

While I have shown a machine in which the rotor .is adapted to be revolved, it is obvious that the same may be oscillated and the same effect produced. And while I have shown a magneto equipped with two windings distinct from each other except where connected to the frame of the magneto, 1t is obvious that a single winding or a plurality of windings may be employed, and that the shape of the core on which these are placed may be modified within wide limits-for instance` the core may be round lor oval with the pole shoes extending toward the center fromopposite points, the windings being placed on opposite sides of the pole shoes.

The operation of a magneto as just described is as follows Considering the lefthand pole of the magnet 4 to be of N polarity polar extension 19 is of the same polarity and remains so, regardless of any position in which it may be. The rotor as a whole, be-

ing in the position shown in Fig. 2, the magv -iietic flux will How from the N pole of the magnet through the polar extension 19 to the pole shoe 15 as soon as the rotor is revolved to the left, then through the laminated core 9 to pole shoe 14 to polar extension 2O to the S side of the magnet. As the rotor revolves the polar extensions bridge the upper and lower gaps between the pole shoes yand magnetically short circuit the field structure. A further revolution of the armature will cause a reversal of the magnetic flux. In synchronism with the peak of the current produced in the winding by reason of the change in vthe magnetic flux, the interrupter mechanism is operated by the cam 22 thereby opening the short circuit around the primary-winding which causes a iiow of current in the secondary windingA thereby producing the spark at the 1plug. It will be observed that only two pea s of current are produced per revolution and for one orl two cylinder engines no distributer is necessary in the secondary circuit, al- 7 though it is obvious one may be employed 1n the case of multicylinder engines.

I claim: j

1. In a dynamo for ignition, a magnet, rotatable polar extensions on said magnet having a permanent N and Sv polarity irrespective of their movements jin relation to the magnet, curved radial faces on said polar extensions, an adjustable field structure, windin s on said field structure, curved faces on ysai field structure adjacent the radial faces of said polar extensions, and a condenser carried by said field structure.

2. In a dynamo for ignition, a substantially U shaped magnet, movable polar extensions on the extremitiesy'thereof and in contact therewith, a supportfor said extensions, means interposed between said extensions whereby the motion of one is transmitted to the other, a field structure projecting partly into the bend of said magnet, windings on said structure,.and a condenser carried thereby. Y

3. In a .dynamo for ignition, a substantiali l U shaped magnet a rotor formed of polar extensions on said magnet, said rotor consisting of supporting shafts and magnetic conducting elements formed integral therewith; said elements being joined together in the center by a. non-magnetic block, and an adjustable field structure having two or more windings and carrying interru ter contacts and a condenser.

4. n a dynamo for ignition, a magnet having poles and rotatable polar extensions 10a having a permanent N and S polarity, a shaft for said extensions, supports for said shaft, a plurality of windings, a core for said windings, extensions on said core forming pole shoes adjacent the path of travel of said polar extensions of said magnet, a condenser carried by said core and connected to one of the windings, and means for varying the angular position of said pole shoes with respect to said magnet poles.

5. I n a dynamo for ignition, a base, a magnet. fixed to said base, extensions on said base forming bearings, a core structure carried in said bearings, two windings on said core7 a condenser carried by said core stiuc- 120 ture, and lneans interposed between said .magnet and core structure for varyingthc magnetic flux between them, said means comstructure movably supported in said bearings, a rotor and shat't therefor movably supported in said core structure, polar extensions`for`said magnet carried by said shaft and having detinite N and S polarity, a cam ou saitLsh-aft, iuterrupter mechanism carred bysaid core structure andoperated by Cil said cam, windings on said' core structure, and a VVcondenser carried thereby.

T. In a dynamo for ignition, a base, a magnet carried thereby, a held structure forming a core and having its field opening at substantially right angles to the poles ot' saidi-mlgnet, movable polar extensions for saidv magnet projectinginto said tield openin?, supports for saidti'eld structure whereiyits-angular position may be varied with respectto the magnet poles, windings on said field structure, and a condenser carried thereby. y y y '8. In -a dynamo for ignition, a base, a ,substantially U shaped magnet carried thereby, openings 'through the polar extremities oi said magnet, vertical extensions on said base, bearings in said vertical extensions co.

axial with the openings of said magnet, magnetic end plates supported in said bearings, a lamiiiated core structure between said end plates and supported thereby, extensions on said core structure 'forming pole shoes, Windings on said core structure, a condenser connected to one`ot` said windings,- bearings in said end plates, movable polar extensions for said magnet supported in said end plate bearings, non-magnetic material between said polar extensions whereby motion may vbe transmitted between them, interruptor mechanism carried by one end plate and mo\ able therewith, and a cam carried by the V`shaft ot' one of said polar extensions for op- Yeratlng the mterrupter contacts.

9.. ,X magneto electric machine comprising` a. U-shaped. permanent magnet structure, a hase nu-mher of non-magnetic material embracing the poles ot said magnet structure, a rotary induetoi embraced by said magnet poles inv an end-wise position and having stub shafts which project through apertures in said lield magnet structure and are jour- .nalcd in bearings carried on .said base.

10. A magneto'electric machine comprising a permanent field magnet structure, said structure havingtransversely alined apertures in its poles. a rotary inductor embraced in an end-wise position by the poles .of said magnet, and bearings therefor supported laterallj7 of saidv magnet poles and supporting the shaft of said rotary inductor free from the interior walls of said aperture.

11. A magneto electric machine comprising -agU-shaped permanent magnet, a base of-non-magnetic material uponl which the magnet is mounted, a rotary inductor embraced by the poles of said magnet in endwise positron and having stub shafts which project through i pei-tures in the poles of said magnet, lateral bearing members supported 'l'rom said base and in turn supporting said rotary inductor free from the side walls ot' said apertures.

12. it magneto electric machine comprising a. U-'shaped permanent magnet having an aperture in each pole on a line extlllillg transversely thereof, an armature structure embraced by said poles and comprising pole shoes. a non-magnetic frame rigidly connecting them together, and end plates of magnetic material supporting said frame, lying laterally adjacent the inner cheeks of said field poles andhaving journal sleeve bushings projecting` through said apertures, and a rotorl located between said pole sho. embraced by the poles of said eld magnet in end-wise position and having stub shafts which project through said journal bushings of the armature structure. l,

13. A magneto electric machine compris ing a. U-shaped permanent magnet, a rotor embraced by the poles of said magneft in an 4end-wise position, adapted to rotate in said position and having inductors of magnetic material having an unbroken magnetic contact with said poles, an armature structure comprising a. pair of spaced pole shoes emb acing said rotor, and a frame of non-mag; nctic material spacing said pole shoes andsupporting the same from the axis of Said rotor whereby the same may be freely adjusted angularly thcreabout.

14. A magneto electric machine comprising a U-shaped permanent magnet, a rotor journaled on an axis transversely of said magnet poles and having inductor members in magnetic contact with the poles of said magnet whereby the same are of permanent north and south polarity, an armaturestructure in juxtaposition to. said incluytor and comprising pole shoes adjacent the path of rotation of said induct-or, and a frame of non-magnetic mate-rial by which' said pole shoes are spaced apart, and through vwhich said armature structure is adjustably supported from the axis'of said rotor, whereby the same maybe moved angularly thereabout.

15. A magneto electric machine comprising a U-shapedpermanent magnet, a rotor j joarnaled in end-wise position between said field poles and on an' axis passing through said eld poles, said ield poles having apertures to accommodate said axis, and an armature structure including a pair of pole shoes, a frame of non-magnetic material spacing said pole shoes apart, and end plates of magnetic material supporting said frame from the axis of Said rotor lying between the said rotor and the poles of said magnet bearing sleeves extending through said apertures concentrically with the axis of said rotor.

'17. A magneto electric machine comprising a U-shaped permanent magnet, a rotor journaled in endwise position between said field poles and on an axis passing through said eld poles, said field poles having apertures to accommodate said axis, and an armature structure including a pair of pole shoes, a frame of non-magnet-ic material spacing said pole shoes apart, and end plates of magnetic material supporting said frame on the axis of said rotor, lying between said rotor and the poles of said magnet respectively and having laterally projecting bearling sleeves extending through said apertures concentrically with the axis of said rotor, said rotor comprising magnetically separated elements of magnetic material having permanent magnetic contact with said magnet poles through said end plates.

18. A magneto electric machine comprising a U-shaped permanent magnet, a rotor journaled on an axis transverse to the poles thereof and having inductor poles in per- `manent magnetic relation each with one ,i pole of 'said magnet, an armature structure in juxtaposition to said rotor and adjustable about the axis thereof, and a contact device on the exterior of one pole of said magnet and connected rigidly with said armature structure for adjustment therewith, together with means driven from the axis of the rotor for operating said interrupter.

19. A magneto electric machine compris;

ing a base of non-magnetic material, up# right projections from ysaid base provided with internal shoulders, a vertically disposed U-'shaped permanent magnet seated on said base against said shoulders and embraced by said projections, an armature structure mounted on an axistransversely of the embraced field poles and having projecting bearings which extend through apertures thereinfand a rotor embraced by said field poles between said projecting bearings in an end-wise position on an'axis concentric therewith, and having inductor poles respectively in permanent magnetic Contact each with a different pole of said ield magnet.

20. A magneto electric machine comprising a base of .non-magnetic material having up-standing projections, a pair of U-shaped permanent magnets arranged side by side with their poles meeting said projections, registering semi-circular apertures in the poles thereof formed on a transverse axis lying in the plane between the poles, a rotor journaled in said apertures in an end-wlse position between said field poles, an armature structure in juxtaposition to said rotor, and means connecting said magnets to the said up-standing projections of the base i; the relation set forth.

21. A magneto electric machine comprising a base of non-magnetic material having 11p-standing projections, a pair of U-'shape permanent magnets arranged lside by side with their poles meeting said projections, registering semi-circular apertures in the poles thereof formed` on a transverse axis lying in the plane between the poles, and a' -rotor journa-led through said apertures on said field poles.

22. A magneto electric machine comprising a base having 11p-standing projections, bearin apertures in said projections, a pair of U-s iaped permanent magnets arranged side by side andv meeting said projections and having registering semi-circular apertures formed on an axis lying in the lane between the poles and coinciding wit the axis of the apertures in said up-standin projections, a rotor embraced by said iel poles in an end-wise position and journaled on the aforesaid axis, said rotor being formed in two separable halves transversely curing said field magnets together about the axis of said rotor, and also securing them to said 11p-standing projections of the base.

23. A magneto electric machine comprising a field structure having rotatable poles, a normally stationary armature structure adjustable angularly about theaxis of said `field oles and a condenser supported upon and movable withvsaid armature structure lhavin electrical connection with the windings t ereof.

:1t/249A 'magneto electric machine comprising a field structure having rotatable poles, a ndrmally stationary armature structure angularly adjustable about Ithe axis of said field poles and having a generating winding, aoondenser supportedfrom said structure and having electrical connections with the generating winding thereof, and interruptor contacts operated by the rotation of.said lield poles and connected to said armature structure for angular adjustment therewith.

A magneto electric machine comprising relatively rotatable field and armature members, said armature structure including the usual generating winding, a circuit interrupter having connection with and controlling said generating winding, and means said axis in an end-wise position between.

rigidly connected together, and means seizo for operating said circuit interruptor from the rotatable one of said members comprising a cam driven from said member and a radially movable ball retained in position to be engagedby said cam and bearing ,upon the movable element of said interrupter.

26. A magneto electric machine comprising relatively rotatable field and armature structures, said armature structure including the usual generating Winding,va circuit .1nterrupter connected with and controlling said Winding and means for operating said circuit interruptor comprising a cam driven by the rotatable one of said members, and a radially movable ball held in fixed angular position bet-Ween said cam and a movable element of said interrupter.

27. In a magneto electric machine, a field structure having rotatable'poles, a normally, stationary armature structure adjustable about the axis4 of said field poles, said armature structure including the usual generating Winding, interrupter contacts anda supporting frame .therefor rigidly connected With said armature structure for adjustment therewith and having electrical connection With said generating Winding, and means -to .operate said interruptor comprising a cam driven from said rotatable field poles, and a ball carried 1n a. socket 1n the frame of said interruptor between said camfand a movable velement of the interrupter.

- 28. A magneto electric machine comprising a base of non-magnetic material, upstanding projections on4 saidvbase having transversely alined journals therein, a rotor mounted in said journals in an end-Wise position and a U-shaped permanent magnet supported from said base, embracing said rotor and having apertures in its poles through which the shaft of said rotor asses Without. contact With the Walls thereof? 29. A magneto electric machine comprising a base of non-magnetic material, upstanding projections thereon, a U-shaped permanent magnet the poles of which overlap said projections and are fixed in transverse position as respects said base thereby, a rotor journaled on an axis transversely of said overlapping parts in an end-wise position between said field poles and comprising inductor elementsin permanent magnetic contact each with one of said field poles, and an armature structure in juxtaposition to said rotor.

l 30. A. magneto electric machine comprising a base of nen-magnetic material,` upstanding projections therefrom, a U-shaped jiermanent magnet the poles of which overlap said projections and are fixed in transverse position as respects said base thereby, a rotor journaled on an axis transversely of said overlapping parts in an end-Wise position between said field poles, and an armature structure comprising a. .pair of pole 'ing a field structure having rotatable indue-tor poles of permanent and opposite magnetic polarity, the main body of said field structure being normally stationary, and an armature structure mounted in juxtaposition to said rotatable field poles and adjustable bodily"'in angular relation with respect thereto, said armature structure comprising a pair of spaced armature pole shoes,

.a frame of non-magnetic material rigidly connecting the same together at their lower ends, a core of magnetic material connecting the same together. at their upper ends, an armature Winding carried by said core, and end plates of magnetic material by WhichA said frames are supported upon the axis of Said rotatable field poles for adjustment' thereabout, and through Which flux is conducted from the normally stationary part of said field structure to the rotatable poles thereof. 32. A magneto electric machine compristor poles 0f permanent and opposite magnetic polarity, the main body of said field structure being stationary, a shaft of nonmagnetic material on which said rotatable poles are journaled, and an armature struc,

ture mounted in juxtaposition to said rotatable field poles and comprising a pair of spaced pole shoes, a circular frame Work of non-magnetic material fixing said shoes together and spacing the same apart at their inner ends, a core of magnetic material connecting pole shoes at their upper ends, an armature Winding carried by said core, and magnetic end plates connected with said framework having laterally -s projecting bearing sleeves journaled on the aforesaid shaft and by means of which said armature structure is supported upon said shaft, the fiuX from the fixed portion of said field structure being conducted to the rotatable poles thereof through said end plates.

38. A magneto electric machine comprising a base. of' non-magnetic material, abutments formed on the upper face of said base, a pair of U-shap'ed permanent magnets forming a field structure and positioned t0- gether on said base by said abut-ments, registering semi-circular `apertures formed on a traverse axis on adjoining sides of said eld magnets, a rotatable inductor jo-urnaled in said apertures, an armature structure mounted in coperative relation thereto and securing said permanent magnets to said base.

34. A magneto electric machine comprising a field structure having rotatable induc- 

